Name
- Couper, Henry, Lieutenant-Colonel; Deputy Inspector-General of Foreign Corps1
- Craufurd, James, diplomatist1
- Crosbie, William, Major-General1
- Culverhouse, John, Captain; RN1
- Cuthbert, James Ramsey, MP1
- Daniell, Deputy Commissary-General at Constantinople, fl 18071
- Degen, Frederic, diplomat, fl 1800-18061
- Dillon, William, correspondent of Sir Arthur Paget, fl 18001
- Dimsdale and Clay, bankers? London1
- Donkin, Robert, of Bath, correspondent of Sir Arthur Paget, fl 1810-18151
- Drummond, William, diplomat, fl 1801-18111
- Dundas, Henry, 1st Viscount Melville, lawyer, politician and statesman, 1742-18111
- Dundas, William, barrister and politician, 1762-18451
- Duranti, -, correspondent of Sir Arthur Paget, fl 18001
- Durazzo, Laurent, of Vico, correspondent of Sir Arthur Paget, fl 18001
- Durno, James, Knight, diplomat, 1751-18071
- Elliot, Hugh, diplomat and adventurer, 1752-18301
- Elphinstone, George Keith, Admiral Viscount Keith1
- Esterházy, Count1
- Esterházy, Nicholas?, Prince of Galántha1